Prince George and Prince William wave to fans and photographers outside the Lindo Wing in London on May 2. Credit: Anwar Hussein/WireImage

Proud big brother! While the world waited (and waited!) for Princess Charlotte Elizabeth Diana to be born, one tiny tot was especially enthused to meet the youngest royal. 

"George was very excited to meet his sister," a family friend tells Us Weekly of Kate Middleton and Prince William’s firstborn.

Hours after Charlotte’s birth, the third in line to the throne, 21 months, visited his newborn sis on Saturday, May 2, being carried into the Lindo Wing of St. Mary’s Hospital in London in the arms of his dad. Wearing an all-blue ensemble, little George waved at the excited crowd before entering the wing to meet his sibling.  

"George was aware that he would soon have a new brother or sister and has been excited throughout the pregnancy,” a family friend tells Us. “He might have been a little shy around the new baby, but I heard everything went well. He’s great around other children. He’s a very curious boy."

The family brought home their newest bundle of joy to Kensington Palace and were promptly visited by a slew of guests, including Pippa, Carole, and Michael Middleton and Prince Charles, Camilla Parker Bowles, and Emilia Jardine-Paterson

"The Palace was inundated by flowers and gifts from around the world, many from members of the public and others from important figures and officials they have met over the years,” a source tells Us.

Little Charlotte’s grandfather Prince Charles is “over the moon about having a granddaughter. He’s a very proud man at the moment,” a source tells Us, adding, "He was convinced all along that it would be a girl."

As for the second-time parents, a family friend tell Us they are “ready to take on the challenge” of raising two children, adding, “They are a lot more calm this time. I remember when George was brought back after he was born and they were so nervous. But the second time they feel relaxed and are able to take in and enjoy these first moments at home with the baby."